Mafumafu is a Japanese singer-songwriter. In addition to his solo work, he is one half of the music duo After the Rain with fellow utaite singer Soraru. His broad vocal range, spanning over five octaves, allows him to sing in an extremely high register, and in addition to his original music, he often covers Vocaloid songs in their original key. He represents himself with a white-haired, red-eyed character with a barcode on his left cheek. As of April 21, 2024, his RUclips channel has over 3.54 million subscribers, and his videos have amassed over 2.25 billion views.
Mafumafu plays guitar and piano. He has written and produced music for video games, anime, and other artists.
On June 5, 2022, Mafumafu announced on Twitter that after his concerts on June 12 at Tokyo Dome, he would go on an indefinite hiatus from all personal music activities as Mafumafu for the first time in 11 years, citing his medical condition. On January 8, 2023, Mafumafu announced that he would slowly resume activities.